m74hc238 STMicroelectronics, m74hc238 Datasheet - Page 2

• Manufacturer Part Number: m74hc238
• Description: 3 To 8 Line Decoder
• Manufacturer: STMicroelectronics

M74HC238
INPUT AND OUTPUT EQUIVALENT CIRCUIT
TRUTH TABLE
X : Don’t Care
LOGIC DIAGRAM
This logic diagram has not be used to estimate propagation delays
2/10
G2B
X
X
H
L
L
L
L
L
L
L
L
ENABLE
G2A
H
X
X
L
L
L
L
L
L
L
L
G1
X
X
H
H
H
H
H
H
H
H
L
INPUTS
C
H
H
H
H
X
X
X
L
L
L
L
SELECT
B
X
X
X
H
H
H
H
L
L
L
L
A
X
X
X
H
H
H
H
L
L
L
L
Y0
H
L
L
L
L
L
L
L
L
L
L
Y1
H
L
L
L
L
L
L
L
L
L
L
Y2
H
L
L
L
L
L
L
L
L
L
L
PIN DESCRIPTION
12, 11, 10, 9,
15, 14, 13,
PIN No
1, 2, 3
OUTPUTS
Y3
4, 5
H
L
L
L
L
L
L
L
L
L
L
16
6
7
8
Y4
H
L
L
L
L
L
L
L
L
L
L
SYMBOL
G2A G2B
Y0 to Y7
A, B, C
GND
Y5
V
H
L
L
L
L
L
L
L
L
L
L
G1
CC
Y6
H
L
L
L
L
L
L
L
L
L
L
Data Inputs
Enable Input (Active
LOW)
Data Enable Input (Active
HIGH)
Outputs
Ground (0V)
Positive Supply Voltage
NAME AND FUNCTION
Y7
H
L
L
L
L
L
L
L
L
L
L
SELECTED
OUTPUT
NONE
NONE
NONE
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7